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Alt Text Analyzer - Check Image Accessibility

Alt Text Analyzer

Analyze the quality of your image alt text to ensure it's accessible, descriptive, and follows best practices.

Enter the alt text you want to analyze for quality and accessibility.

What is Alt Text?

Alt text (alternative text) is a written description of an image that appears in place of the image if it fails to load, and is read aloud by screen readers to help visually impaired users understand the content and context of images.

Why Alt Text Matters:

  • Accessibility: Essential for screen reader users who can't see images
  • SEO: Helps search engines understand image content and context
  • User Experience: Displays when images fail to load due to slow connections
  • Legal Compliance: Required by accessibility laws like ADA and Section 508

How to Use This Tool:

  1. Enter Alt Text: Type or paste the alt text you want to analyze
  2. Analyze: Click "Analyze Alt Text" to check quality
  3. Review Issues: Check for common problems like placeholder text or excessive length
  4. Read Suggestions: Follow recommendations to improve your alt text
  5. Revise and Retest: Update your alt text and analyze again until it passes

Alt Text Best Practices:

DO:
  • Be specific and descriptive (e.g., "Golden retriever catching a red frisbee")
  • Keep it concise - aim for 125 characters or less
  • Describe the content and function of the image
  • Use proper punctuation for natural screen reader flow
  • Include relevant context for the surrounding content
DON'T:
  • Start with "Image of" or "Picture of" - screen readers announce it's an image
  • Use placeholder text like "image123.jpg" or "untitled"
  • Include file extensions (.jpg, .png, etc.)
  • Write extremely long descriptions (use captions instead)
  • Leave alt text empty unless the image is purely decorative

Examples:

❌ Poor Alt Text:
"image", "photo123.jpg", "click here"

Too vague, contains file names, or uses placeholder text.

⚠️ Okay Alt Text:
"Dog playing"

Better, but lacks important details and context.

✓ Good Alt Text:
"Golden retriever catching a red frisbee in a sunny park"

Descriptive, specific, and provides context without being too long.

Common Issues This Tool Detects:

  • Too Short: Less than 10 characters - likely not descriptive enough
  • Too Long: Over 125 characters - consider using a caption instead
  • Placeholder Text: Generic words like "image", "photo", "graphic", "click here"
  • File Extensions: Contains .jpg, .png, .gif, etc.
  • Redundant Phrases: Starts with "Image of", "Picture of", "Photo of"
  • Empty Alt Text: No description provided

When to Use Empty Alt Text:

Use alt="" (empty string) for purely decorative images that don't add meaningful content, such as:

  • Decorative borders or spacers
  • Icons that duplicate adjacent text
  • Images used purely for visual design

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